Nanobot uses a DNA clutch to engage its engine

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The robot has a gold and iron core and is surrounded by a gold cage. DNA serves as its clutch.

Jinwoo Cheon

A nanoscale robot with a clutch can engage or disengage its engine, allowing for more precise control over its motion. It could be used to kill harmful cells.

Tiny clutches already exist in nature – for example, the bacterium Bacillus subtilis has long, hair-like structures called flagella, each attached to a rotating molecular engine. “Once [the bacteria] arrive at their target area, they will take a rest,” says Jinwoo Cheon at…

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